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Finding the Fourth Proportional to 18,600.30, 27,900.45 and 11,213.10

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Solution

The fourth proportional to 18,600.30, 27,900.45 and 11,213.10 is: 16,819.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,600.30 : 27,900.45 = 11,213.10 : x
  2. Step 2: Convert to fraction form
    18,600.30/27,900.45 = 11,213.10/x
  3. Step 3: Cross multiply
    18,600.30x = 27,900.45 × 11,213.10
  4. Step 4: Simplify right side
    18,600.30x = 312,850,535.90
  5. Step 5: Solve for x
    x = 312,850,535.90/18,600.30
  6. Step 6: Final answer
    x = 16,819.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.